Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba6f9febdaf5830…

MALICIOUS

PDF

84.2 KB Created: 2021-06-08 00:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24b3072dfc773f06227d493580732458 SHA-1: 52417371de8c3515ff817a99b9497e6a4e596fce SHA-256: 2ba6f9febdaf5830f33a1dd2f8f998f1bca37e919cdcb34d5144b7f21369d0a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with a significant number pointing to Weebly-hosted PDF files, suggesting a link farm or redirection mechanism. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the presence of URLs like 'https://pixomot.ru/pbw?utm_term=back+to+the+future+2+480p' suggests a lure to download content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pixomot.ru/pbw?utm_term=back+to+the+future+2+480p
    • https://welarozukakiwa.weebly.com/uploads/1/3/4/4/134497755/343094e8.pdf
    • https://pimusaxasoj.weebly.com/uploads/1/3/1/8/131856122/gekimalal-bixumikeli.pdf
    • https://gizazegixewaner.weebly.com/uploads/1/3/4/5/134596748/juwekukizup.pdf
    • https://wukajimodowel.weebly.com/uploads/1/3/0/8/130874313/cbc1bc24d7d9266.pdf
    • https://rafesotel.weebly.com/uploads/1/3/4/3/134321319/fetomifamefij.pdf
    • https://koponabunabo.weebly.com/uploads/1/3/4/5/134520941/2598250.pdf
    • https://xamivozafuju.weebly.com/uploads/1/3/5/3/135308546/08e9332e36552f.pdf
    • https://nodizolubuta.weebly.com/uploads/1/3/5/2/135297944/pikuli-lumoxapi-vejam.pdf
    • https://cdn-cms.f-static.net/uploads/4401973/normal_606c5dcfae090.pdf
    • https://static.s123-cdn-static.com/uploads/4419836/normal_5fe4d2be55037.pdf
    • https://lusulabudigesa.weebly.com/uploads/1/3/2/6/132681481/8864675.pdf
    • https://fabexitib.weebly.com/uploads/1/3/4/1/134109013/kenelujutizope.pdf
    • https://cdn-cms.f-static.net/uploads/4492259/normal_602a8b44d17d5.pdf
    • https://cdn-cms.f-static.net/uploads/4502819/normal_6013b0c3410d5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cd8003ea-7857-422f-809c-502db04341dd/27544171760.pdf
    • https://uploads.strikinglycdn.com/files/4a6b5c68-2918-426c-b591-cb5ea0fb2e6e/45864823688.pdf
    • https://uploads.strikinglycdn.com/files/14c91eea-b8b4-4e46-bb2a-170c1bc66e0a/true_love_quotes_in_hindi_for_bf.pdf
    • https://uploads.strikinglycdn.com/files/39c34d66-1065-46ac-8f5f-e3d94f14186f/70832070647.pdf
    • https://uploads.strikinglycdn.com/files/b1d34ffa-1240-4923-853a-96d372534a7d/what_is_the_saying_hard_cheese.pdf
    • https://uploads.strikinglycdn.com/files/687c93a5-06ff-46ef-9fc8-3f4ed29f1ec8/79741196565.pdf
    • https://uploads.strikinglycdn.com/files/85e1706e-6fa5-4ee1-af61-b90562b0252d/black_and_decker_leaf_hog_bv2500.pdf
    • https://uploads.strikinglycdn.com/files/e0f722b5-60b5-41e6-89da-531ee1ca390a/how_to_control_ocd_rituals.pdf
    • https://uploads.strikinglycdn.com/files/cfbda4ea-58a8-4975-9f67-eda006f6ddee/tetolokifejojuvopiwivovo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f66f.bin
127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF66F 6744 bytes
font_01_sfnt_off00010756.bin
f88e8b0e9486bdf70a478b0b18415b11584cf6a140bea70bb20717b7101232a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10756 5560 bytes
font_02_sfnt_off00011a47.bin
b58b8750cd34d05765370c1ac02dc8145c4d6265279c8edd79c25101db8aacfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A47 11328 bytes